<div dir="ltr"><div><div><div>Questions about WebExtensions are best directed to the <a href="mailto:dev-addons@mozilla.org">dev-addons@mozilla.org</a> list, but someone might pipe in here.<br><br></div>There is some work spinning up on a new theming API -- we'll have more to say about that very soon.<br><br></div>As for XUL, the long term direction is to move away from it. Most likely to HTML, and some parts of the browser have already been doing so. Devtools, in particular, is based on a modern React stack. Change is slow here, because we've accumulated a lot of XUL over the years, the work hasn't been resourced as a priority, and in some cases there are things XUL/XBL do that don't have a straightforward replacement in HTML.<br><br></div>Justin<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Jan 2, 2017 at 1:08 PM, Mitchell Ferguson <span dir="ltr"><<a href="mailto:mitchell@ferguson.geek.nz" target="_blank">mitchell@ferguson.geek.nz</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div><div>Hi all,<br><br></div>I'm a great fan of Firefox, and I use it to it's fullest every day. One thing I love is that I can style the UI with my own CSS, making it super easy to change how FFx looks. I currently use the Stylish addon to do this, but it's a XUL addon which will thus someday be going away.<br><br></div>I assume a WebExtension API for inserting stylesheets already exists, but will it be possible to also insert CSS into the user interface? I understand a new theming API is being developed, will it include this functionality?<br><br></div>Also, are there any plans to move away from the XUL UI entirely? Or any other changes which would completely prevent CSS theming of the UI?<br><br></div>Thank you!<br></div>
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